<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="http://www.bilibili.com">
  用户名:<input type="text" name="username" maxlength="5"
         value="abc" readonly><br>
  密码:<input type="password" name="password"><br>

  性别:<input type="radio" name="gender" value="man" id="r1">
  <label for="r1">男</label>
  <input type="radio" name="gender" checked value="weman">女<br>

  兴趣爱好: <input type="checkbox" name="hobby" value="smoke">抽烟
          <input type="checkbox" name="hobby" value="drink">喝酒
          <input type="checkbox" name="hobby" value="tt">烫头<br>

  生日:<input type="date" name="birthday"><br>
  图片:<input type="file" name="picture"><br>

  所在地:
  <select name="city">
    <option value="cd">成都</option>
    <option value="rc">蓉城</option>
    <option value="tf" selected>天府</option>
  </select>

    <input type="submit" value="注册">
</form>
</body>
</html>